EP3245323B1 - Method in order to apply flat material pieces of desired shape to an embroidery base by means of an embroidery machine or sewing machine and a device for an embroidery or sewing machine in order on the embroidery base to cut out flat material pieces such as figures made from another material applied to the embroidery base - Google Patents

Method in order to apply flat material pieces of desired shape to an embroidery base by means of an embroidery machine or sewing machine and a device for an embroidery or sewing machine in order on the embroidery base to cut out flat material pieces such as figures made from another material applied to the embroidery base Download PDF

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Publication number
EP3245323B1
EP3245323B1 EP15804501.3A EP15804501A EP3245323B1 EP 3245323 B1 EP3245323 B1 EP 3245323B1 EP 15804501 A EP15804501 A EP 15804501A EP 3245323 B1 EP3245323 B1 EP 3245323B1
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EP
European Patent Office
Prior art keywords
material layer
embroidery
opening
housing
cutting
Prior art date
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Active
Application number
EP15804501.3A
Other languages
German (de)
French (fr)
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EP3245323A1 (en
Inventor
Franz Lässer
Karl-Heinz GERSTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laesser AG
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Laesser AG
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Publication date
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Publication of EP3245323A1 publication Critical patent/EP3245323A1/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C7/00—Special-purpose or automatic embroidering machines
    • D05C7/10—Special-purpose or automatic embroidering machines for separating and burning-off parts of the base fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C7/00—Special-purpose or automatic embroidering machines
    • D05C7/08—Special-purpose or automatic embroidering machines for attaching cords, tapes, bands, or the like
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices
    • D05D2207/04—Suction or blowing devices

Definitions

  • the invention relates to a method for applying flat material pieces of the desired shape to an embroidery base by means of an embroidery machine or sewing machine cut out a material applied to the embroidery base according to the preamble of patent claim 7.
  • Embroidery machines in the sense of the invention mean large embroidery machines with a large number of up to a thousand or more needles, with which embroidery patterns are embroidered on an embroidery base which can extend over the entire length of the machine.
  • Small embroidery machines with horizontally arranged embroidery bases and quilting machines are also referred to as embroidery machines.
  • sewing machines that can be embroidered on Machines understood that also produce embroidery patterns on an embroidery base clamped in an embroidery frame, which can be driven in the X / Y direction by a drive device.
  • the needle can be driven in the Z direction and the embroidery base can be moved in the X / Y direction with respect to the needles.
  • a laser beam is controlled by the machine electronics and guided with mirrors and focused on the application with lenses so that the cutting can be carried out with the focal point placed in the application.
  • Such a device is for example from the DE 10 2005 050 482 known by Saurer.
  • the disadvantage of this device is the huge effort and the low cutting performance. The effort is in a along the Box-shaped device which can be moved by the embroidery machine and which comprises a space closed above the embroidery for extracting the gases and other pollutants produced by cutting or burning out the application, and the complex electronics and optics for guiding the laser beam, the focal point of which is caused by the deflection of the laser beam along the Embroidery needs to be corrected on an ongoing basis.
  • the low productivity is that only a small field of the embroidery of a maximum of 50x50 cm can be processed and then the cutting device is adjusted along the embroidery machine and adjusted to the existing embroidery at the new location.
  • cutting with the known lasers becomes more expensive because a separating layer must be inserted between the embroidery base and the application, which prevents the embroidery base from being damaged by the heat at the focal point of the laser beam. The separating layer must later be removed by washing out.
  • heating tips arranged on the embroidery machine enable the cutting out of an application consisting of synthetic fibers.
  • this device can advantageously cut simultaneously over the entire length of the embroidery machine at different points. On the one hand, it enables this To cut the device with a plurality of cutting points at the same time without the need for extraction for the vapors produced.
  • the only disadvantage of the device is that only applications made of a meltable or low-meltable plastic material can be cut with a heatable tip. Natural fibers such as cotton, wool or leather cannot be cut with this device.
  • a single-head embroidery machine which comprises a laser processing machine in order to cut out an application from a fabric or a fabric layer. If the application is to be cut out of a fabric layer, this fabric layer lies on another fabric layer that should not be cut.
  • the fabric or the fabric layers lie directly on a laser receiving plate.
  • the laser receiving plate has a tap hole through the center of which the correctly focused laser runs. This arrangement is suitable for fabrics or fabric layers stretched in an embroidery frame, which lie directly on the laser receiving plate and are pressed onto the laser receiving plate by the holding-down part with the spring force of the spiral spring.
  • JP-H08-243776 Another disadvantage of the tap hole according to the exemplary embodiments shown in JP-H08-243776 is the emission of laser light into the production space when the laser light penetrates the fabric web.
  • the use of the solution according to JP-H08-243776 elaborate protective devices to protect employees from harmful laser light emissions, especially when using a coarse-mesh fabric.
  • the solution according to JP-H08-243776 also requires complex suction devices for the extraction of harmful gases that arise from the cutting process, for which purpose a separate suction nozzle and a line running through the frame to the suction fan must be provided.
  • An object of the present invention is to provide a method and a device with which both meltable applications and non-meltable applications can be cut, the thickness of the flat piece of material being variable.
  • Another object of the invention is that the cutting is made possible not only at a single point, but also at a plurality of points arranged along the embroidery machine.
  • Another task is to create a device with which the application can be positioned at the optimum position Cutting element not only positioned in the XY direction, but also in the Z direction and can be guided to the effective area of the cutting element in the optimal position during cutting.
  • a further object of the invention is to dissipate the energy required for the cutting and fed into the cutting area and the resulting heating of machine parts as well as impurities and gases occurring during cutting on site.
  • a method for applying flat material pieces of the desired shape to an embroidery base by means of an embroidery machine or sewing machine comprises the following steps: at least one material layer arranged above the embroidery floor. Controlled by a program of the embroidery machine or sewing machine, a relative movement is generated between a cutting device arranged on the embroidery or sewing machine, containing a cutting element and the material layer, in order to cut out a piece of material from the material layer with the cutting element, the cutting element together with a housing into which the cutting member is inserted, in the direction of the material layer and / or the material layer and the Stick floor is pushed to the housing until the front of the housing touches the material layer.
  • the material layer lies smoothly on the front of the housing, which forms a reference plane E, the cutting element penetrating into the material layer through an opening formed in the front of the housing, and the material layer being cut by the cutting element. During the cutting process, the material layer is sucked into the opening by a negative pressure present in the interior of the housing.
  • the material layer can be positioned on a bead that completely or partially surrounds the opening.
  • air can be built up in the interior of the housing to extract a lower pressure than the surroundings, by means of which the material layer adjacent to the opening is sucked into the opening of the housing by the air flowing into the housing.
  • a laser beam can be passed through the housing as a cutting element for cutting the material layer, the focal point of which is focused in the region of the opening which forms a reference plane E and cuts the material layer.
  • the cutting process can include at least one of the cutting methods melting, burning, evaporating.
  • the cutting device can comprise a heatable tip which is arranged in the housing, the heatable tip penetrating a reference plane E above the opening by the amount of the thickness of the material layer and cutting the material layer.
  • the material layer can contain a synthetic fiber. According to the invention, the material layer is lifted off the embroidery base when it is sucked into the opening of the cutting device, so that the cutting member does not touch and damage the embroidery base when the material layer is being cut.
  • An embroidery or sewing machine contains a cutting device for an embroidery base with a material layer, the material layer lying on the embroidery base, the embroidery machine or sewing machine comprising a control program for controlling the cutting device, so that flat material pieces can be cut by the material layer through the cutting device.
  • the cutting device comprises a cutting member.
  • the cutting device can be moved between a rest position and a working position on the material layer via the embroidery base and / or the material layer can be brought up to the cutting device.
  • the cutting member is arranged in a housing of the cutting device.
  • the housing has an opening, the opening in the working position with the Material layer can be brought into contact such that the cutting member can penetrate into the material layer in the region of the opening.
  • a negative pressure can be generated in the interior of the housing and is suitable for sucking the material layer onto the opening.
  • the cutting device is designed in such a way that the material layer is lifted off the embroidery base when it is sucked into the opening, and the cutting element is arranged in such a way that it does not touch and damage the embroidery base when the material layer is cut.
  • the opening can be completely or partially enclosed by a bead.
  • a suction line opens into the housing, air being able to be sucked in through the opening, so that the material layer which is in the working position in front of the opening lies against the opening.
  • a heating tip can be arranged as a cutting element in the housing, by means of which the material layer at the opening can be severed.
  • a laser module for generating a laser beam can be arranged in the housing as the cutting element, in the focal point of which the material layer at the opening can be cut.
  • a blown air line opens into the housing in order to form an air flow with which dirt particles and / or gaseous impurities can be removed from the area of the cutting member and removed by means of the suction line.
  • the Suction line open into an annular zone in the housing, which is delimited on the inside by a jacket in which the laser beam is guided or the heating tip is arranged.
  • dirt particles and / or gaseous impurities can be suctioned off from the cutting area in a particularly advantageous manner, so that they cannot get into the machine room.
  • the emissions are removed at the point of origin, so that further protective measures for employees can be dispensed with, since the emissions are sucked off before they are released into the production area.
  • the flow-side front end of the jacket can end at a distance from the opening of the housing, such that the scavenging air introduced into the central area surrounded by the jacket contains the air that passes through the material layer and is sucked in through the opening through the annular zone in front of the The opening is redirected with the extracted air and gets into the suction line with the dirt particles and / or gaseous impurities.
  • the jacket can in particular have an inner surface which is designed as a cone, the cross section of the cone tapering in the direction of the opening, so that a conical channel is formed.
  • the purge air is pressurized through an opening in the jacket introduced the interior delimited by the inner surface of the cone and serves to remove contaminants, which can impair the mode of operation of the laser passing through the interior, from this interior.
  • the volume flow of the purge air can in particular be approximately 15 l / min. So that the scavenging air can be diverted and sucked off via the mouth opening of the jacket, a vacuum of higher magnitude is applied to the outside of the jacket.
  • a chamber or a space can be arranged between the outside of the casing and the housing. So that the purging air entering the room from the mouth opening can be sucked out of this room without it passing through the opening, the vacuum in this room must be higher than the pressure of the purging air.
  • the volume flow of the extracted air is at least five times, preferably six times the volume flow of purge air introduced into the jacket. For example, a volume flow of approximately 100 l / min of air can be extracted from the room.
  • the opening can be arranged in a guide or support plate extending laterally to the opening, the lateral edges of which are formed at an acute angle to the surface of the guide or support plate.
  • a diode laser can be used as the laser.
  • the diode laser can have a wavelength in the range from 435 nm to 455 nm. In particular, the wavelength can be 455 nm. The smallest and strongest lasers are currently available in this wavelength.
  • This diode laser is particularly advantageous because it is a powerful laser, especially for an output of 8W.
  • This power of 8W is the diode output power before deflection and any optical elements used to bundle the laser beam. From the diode or the plurality of diodes, the collimated, i.e. parallel laser light bundled at a defined reference point using a converging lens.
  • the output power can drop compared to the nominal power of 8W.
  • a plurality of diode lasers can be optically connected, in particular four diode lasers can be optically connected.
  • the heat of the cutting element generated during cutting is dissipated directly from the area of the fabric, ie the embroidery base and the application. Transfer of heat to other machine elements of the embroidery machine is reduced. In this way, cutting is more suitable in continuous operation. Furthermore, the exact positioning of the material layer, ie the application in relation to the focal point of a laser beam or a heating tip, enables tenths of a millimeter to be achieved, which means that on the one hand it is possible to work with very little power and on the other hand, a minimal amount of harmful gases is generated.
  • Another very important advantage is that by sucking the application onto the opening of the room, the application is easily lifted off the surface of the embroidery base and therefore the energy required for cutting, which has to be introduced into the application, is not also directly on the Embroidery base is produced and may discolor it, but it cannot damage it. This is particularly the case when cutting applications with a laser that do not melt, but that have to be scorched, burned or evaporated for cutting. By lifting the application from the embroidery base, there is no need to insert a separating layer that is later difficult to wash out.
  • Diode lasers are very small and can therefore be positioned at short lateral distances along the embroidery machine and can thus cut out a large number of figures distributed over the entire length of the embroidery machine.
  • the dimensions of the individual cutting devices are so compact that cutting devices can be arranged side by side on the embroidery machine at intervals of slightly more than 100 millimeters. These distances are usually in the area of the small or narrow repetitions of the embroidery. This makes it possible to cut out many small or large figures that have been stitched close together.
  • Reference numeral 1 designates an embroidery machine, in particular a large embroidery machine with a plurality of up to 1100 needles 3 held on needle carriers 4, which needles are positioned in front of stitch holes 5 in a needle plate 7.
  • Essentially cubic formwork 21 is arranged above the needles 3, which schematically represent the cutting devices 9.
  • the cutting device 9 is designed to be connectable to the embroidery machine 1 or to carriers (carriers not shown) running along the embroidery machine 1.
  • the suction lines 17 to the cutting devices 9 are connected to a central suction 19 running along the embroidery machine 1.
  • a drive not shown in detail for example a pneumatic drive
  • a Housing 39 in the cutting device 9, or at least parts thereof, can be guided in the direction of the needle plate 7 and away from it.
  • the supply of compressed air through the compressed air line 11 and with suction air for the central suction line 19, the energy lines and control lines (not shown further) are preferably carried out centrally on the embroidery machine 1.
  • the cutting devices 9 can be arranged side by side over four or five needles 3 or drills or drill holders 6. In other words, a multitude of smallest work areas, which are close to each other, can consequently be processed or cut out with each cutting device 9, without the need to readjust the cutting device 1, as in the prior art.
  • Each cutting device 9 comprises a box-shaped casing 21, for example made of metal, which is designed to be connectable to the embroidery machine 1 (connection to the embroidery machine 1 not shown).
  • a housing 39 for example, on two guide columns 23, which represent a connection to the embroidery machine, there is a housing 39 and therein a laser module 25
  • four diode lasers 27 are guided so as to be longitudinally displaceable in the Z direction by motor or pneumatically.
  • the drive elements for the shift are not shown.
  • the laser is preferably, but not exclusively, diode lasers 27 with a wavelength of 435 nm to 455 nm, which are optically connected.
  • a suitable optical lens 29 is used as a focusing lens.
  • the lens 29 focuses the laser beams 51 of the diode laser 27 at a focal point 49.
  • a conical channel 31, for example, connects to the optical lens 29, into which the compressed air line 11 opens and introduces purge air into the conical channel 31 in order to contaminate the lens 29, among other things to prevent.
  • the focal point 49 can be set precisely in the Z direction by means of this lens 29.
  • the front part of the jacket 33 of the conical channel 31 lies within a space 35 of the housing 39.
  • One or more suction lines 17 open into this space 35.
  • the left-hand end of the space 35 is formed as an opening through an opening 41 in the housing 39.
  • the front end of the conical channel 31 arranged in the space 35 is preferably axially spaced from the opening 41, ie to a reference plane E, which lies above the opening 41.
  • the described spaced position of the channel 31 creates an annular zone 43 between the end of the conical channel 31 and the opening 41.
  • a multiple e.g. six times the air sucked out of the room 35 as supplied.
  • the air flow generated by the negative pressure in the space 35 into the housing 39 pulls at the opening 41 when the housing 39 moves up to an embroidery base 45 spanned on the gate of the embroidery machine 1 with a material layer 47 applied thereon by an embroidery, the latter to the opening 41 on the housing 39 on.
  • the material layer 47 lifts somewhat from the embroidery base 45 in the region of the opening 41.
  • This lifting off results in an air-filled space 48 between the material layer 47 and the underlying embroidery base 45.
  • This space 48 has the effect that the focal point 49 of a laser beam 51, which comes to lie in the material layer 47, is able to separate the material layer 47 and the underlying floor 45 is not damaged.
  • the material layer 47 to be cut is formed by the xy movements of the embroidery machine 1 Embroidery base 45 and the material layer 47 lying thereon past the opening 41.
  • the material layer 47 is always lifted from the embroidery base 45 only in the area of the focal point 49 of the laser beam 51 at the opening 41.
  • the outer edge 42 of the opening 41 or a bead (not shown) surrounding the opening 41 forms the reference plane E (see Figure 5 ), in which the focal point 49 of the laser beam 51 lies. Consequently, the material layer 47 lies in the region of the focal point 49, which can be adjusted exactly with the lens 29 to the material layer 47, which is held slightly flat at the opening 41.
  • the suction of air from the atmosphere through the embroidery base 45 and through the material layer 47 additionally cools the embroidery base 45 and all gases and particles caused by the burning or scorching process of the laser beam 51 are extracted there. Contamination of the embroidery and the surrounding air or parts of the embroidery machine 1 can thereby be optimally prevented.
  • the laser beam 51 or its rays which are harmful to the human eye, are optimally shielded from the environment, since the housing 39 with its opening 41 comes to lie very close to the needle plate 7 and therefore virtually no harmful rays through the embroidery base 45 can exit to the outside.
  • the cutting of the material layer 47 can be cut both without suction at the opening 41 and with suction.
  • the suction increases the security that the material layer 47 lies flat on the opening 41 and thus in the reference plane in which focal point 49 is located.
  • a heating tip can be used in the conical channel 31, the tip end of which projects beyond the opening 41 at most by the thickness of the material layer 47 to be cut.
  • the heating tip thereby separates the material layer 47 without touching and thus damaging the underlying embroidery base 45, which is arranged at a distance from the material layer 47 (cutting tip not shown).
  • the front end of the housing 39 does not run in the shape of a truncated cone towards the opening 41, but the opening 41 comes to lie in a flat guide or support plate 53.
  • the contact area of the cutting device 9 on the material layer 47, which is substantially enlarged by the guide or support plate 53, has the effect, as already mentioned, that very uneven surfaces are also applied to the embroidery base 45.
  • the edge regions or edges 55 of the guide or support plate 53 are preferably arranged at an acute angle to the surface of the guide or support plate 53.
  • a miniaturized design of the cutting device 9 could also be carried out directly on a drill carrier 6 or the needle carrier 4 (both in FIG Figure 3 attached schematically) and lead it to the material layer 45 in front of and from it back to a rest position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Laser Beam Processing (AREA)
  • Sewing Machines And Sewing (AREA)

Description

Gegenstand der Erfindung ist ein Verfahren, um mittels einer Stickmaschine oder Nähmaschine flächige Materialstücke von gewünschter Form auf einem Stickboden zu applizieren gemäss Oberbegriff des Patentanspruchs 1. Gegenstand der Erfindung ist weiter eine Vorrichtung für eine Stick- oder Nähmaschine, um auf dem Stickboden flächige Materialstücke aus einem auf dem Stickgrund applizierten Material auszuschneiden gemäss Oberbegriff des Patentanspruchs 7.The invention relates to a method for applying flat material pieces of the desired shape to an embroidery base by means of an embroidery machine or sewing machine cut out a material applied to the embroidery base according to the preamble of patent claim 7.

Unter Stickmaschinen im Sinne der Erfindung sind Grossstickmaschinen mit einer Vielzahl von bis zu tausend und mehr Nadeln verstanden, mit denen auf einem Stickgrund, der sich über die gesamte Länge der Maschine erstrecken kann, Stickmuster gestickt werden. Weiter werden als Stickmaschinen auch Kleinstickmaschinen mit horizontal angeordneten Stickboden sowie Steppmaschinen bezeichnet. Unter Nähmaschinen, auf denen gestickt werden können, sind Maschinen verstanden, die auf einem in einem Stickrahmen eingespannten Stickgrund, welcher durch eine Antriebsvorrichtung in X/Y-Richtung antreibbar ist, ebenfalls Stickmuster erzeugen. Bei allen Maschinen, d.h. der Stickmaschine und der Nähmaschine ist die Nadel in Z-Richtung antreibbar und der Stickgrund in X/Y-Richtung bezüglich der Nadeln verfahrbar.Embroidery machines in the sense of the invention mean large embroidery machines with a large number of up to a thousand or more needles, with which embroidery patterns are embroidered on an embroidery base which can extend over the entire length of the machine. Small embroidery machines with horizontally arranged embroidery bases and quilting machines are also referred to as embroidery machines. Among are sewing machines that can be embroidered on Machines understood that also produce embroidery patterns on an embroidery base clamped in an embroidery frame, which can be driven in the X / Y direction by a drive device. In all machines, ie the embroidery machine and the sewing machine, the needle can be driven in the Z direction and the embroidery base can be moved in the X / Y direction with respect to the needles.

Beim Sticken sind der Fantasie keine Grenzen gesetzt, weshalb oft nicht nur Stickereien, bestehend aus kürzeren oder längeren Stichen hergestellt werden, sondern dass zusätzlich auf den Stickgrund Materialstücke, sogenannte Applikationen aus gleichem oder einem anderen oder andersfarbigen Material, aufgestickt und danach ausgeschnitten werden.There are no limits to the imagination when embroidering, which is why often not only embroidery consisting of shorter or longer stitches is made, but also that pieces of material, so-called applications made of the same or a different or different color material, are additionally embroidered on and then cut out.

Bis vor wenigen Jahren war es üblich, Schneiden entweder von Hand oder mit einfachen handgeführten Maschinen durchzuführen.Until a few years ago, it was customary to carry out cutting either by hand or with simple hand-held machines.

Es ist auch bekannt, in jüngerer Zeit zum Ausschneiden der Applikationen an den Stickmaschinen einen Laser einzusetzen. Dabei wird ein Laserstrahl, gesteuert durch die Maschinenelektronik und mit Spiegeln geführt und mit Linsen auf die Applikation fokussiert, so dass mit dem in die Applikation gelegten Brennpunkt das Ausschneiden ausgeführt werden kann. Eine solche Vorrichtung ist beispielsweise aus der DE 10 2005 050 482 von Saurer bekannt. Nachteilig an dieser Vorrichtung sind der riesige Aufwand und die geringe Schneidleistung. Der Aufwand liegt in einer entlang der Stickmaschine verfahrbaren, kastenförmigen Vorrichtung, die einen über der Stickerei abgeschlossenen Raum zum Absaugen der durch das Ausschneiden oder Ausbrennen der Applikation erzeugten Gase und anderen Schadstoffen umfasst, sowie der aufwendigen Elektronik und Optik zur Führung des Laserstrahls, dessen Brennpunkt durch die Auslenkung des Laserstrahls entlang der Stickerei laufend korrigiert werden muss. Die geringe Produktivität besteht darin, dass jeweils nur ein kleines Feld der Stickerei von maximal 50x50 cm bearbeitet werden kann und danach die Schneidvorrichtung entlang der Stickmaschine verstellt und am neuen Ort auf die dort vorhandene Stickerei justiert werden muss. Zudem verteuert sich das Schneiden mit den bekannten Lasern dadurch, dass zwischen dem Stickgrund und der Applikation eine Trennschicht eingelegt sein muss, die verhindert, dass der Stickgrund durch die Hitze im Brennpunkt des Laserstrahls beschädigt wird. Die Trennschicht muss später durch Auswaschen wieder entfernt werden.It is also known recently to use a laser to cut out the applications on the embroidery machines. A laser beam is controlled by the machine electronics and guided with mirrors and focused on the application with lenses so that the cutting can be carried out with the focal point placed in the application. Such a device is for example from the DE 10 2005 050 482 known by Saurer. The disadvantage of this device is the huge effort and the low cutting performance. The effort is in a along the Box-shaped device which can be moved by the embroidery machine and which comprises a space closed above the embroidery for extracting the gases and other pollutants produced by cutting or burning out the application, and the complex electronics and optics for guiding the laser beam, the focal point of which is caused by the deflection of the laser beam along the Embroidery needs to be corrected on an ongoing basis. The low productivity is that only a small field of the embroidery of a maximum of 50x50 cm can be processed and then the cutting device is adjusted along the embroidery machine and adjusted to the existing embroidery at the new location. In addition, cutting with the known lasers becomes more expensive because a separating layer must be inserted between the embroidery base and the application, which prevents the embroidery base from being damaged by the heat at the focal point of the laser beam. The separating layer must later be removed by washing out.

Aus der EP1983083 sind weiter ein Verfahren und eine Vorrichtung bekannt, bei der an der Stickmaschine angeordnete Heizspitzen das Ausschneiden einer aus Kunstfasern bestehenden Applikation ermöglichen. In vorteilhafter Weise kann bei dieser Vorrichtung, im Gegensatz zur bekannten Laserschneidvorrichtung, über die gesamte Länge der Stickmaschine an verschiedenen Stellen gleichzeitig geschnitten werden. Einerseits ermöglicht es diese Vorrichtung mit einer Mehrzahl von Schneidstellen gleichzeitig zu schneiden, ohne dass eine Absaugung für entstehende Dämpfe notwendig ist. Der einzige Nachteil der Vorrichtung besteht darin, dass mit einer beheizbaren Spitze nur Applikationen aus einem schmelzbaren bzw. niedrig schmelzbaren Kunststoff-Material geschnitten werden können. Naturfasern, wie Baumwolle, Wolle oder Leder, lassen sich mit dieser Vorrichtung nicht schneiden.From the EP1983083 a method and a device are also known in which heating tips arranged on the embroidery machine enable the cutting out of an application consisting of synthetic fibers. In contrast to the known laser cutting device, this device can advantageously cut simultaneously over the entire length of the embroidery machine at different points. On the one hand, it enables this To cut the device with a plurality of cutting points at the same time without the need for extraction for the vapors produced. The only disadvantage of the device is that only applications made of a meltable or low-meltable plastic material can be cut with a heatable tip. Natural fibers such as cotton, wool or leather cannot be cut with this device.

Aus der JP-H08-243776 ist eine Einkopfstickmaschine bekannt, die eine Laserbearbeitungsmaschine umfasst, um eine Applikation aus einem Stoff oder einer Stoffschicht auszuschneiden. Wenn die Applikation aus einer Stoffschicht ausgeschnitten werden soll, liegt diese Stoffschicht auf einer weiteren Stoffschicht auf, die nicht geschnitten werden soll. Der Stoff oder die Stoffschichten liegen direkt auf einer Laserempfangsplatte auf. Die Laserempfangsplatte weist ein Stichloch auf, durch dessen Mittelpunkt der korrekt fokussierte Laser verläuft. Diese Anordnung ist geeignet für in einem Stickrahmen aufgespannte Stoffe oder Stoffschichten, die unmittelbar auf der Laserempfangsplatte aufliegen und durch den Niederhaltungsteil mit Federkraft der Spiralfeder auf die Laserempfangsplatte gedrückt werden. Wenn allerdings der Stoff oder die zu schneidende Stoffschicht zu grosse Abweichungen in ihrer Dicke aufweisen, erfolgt entweder ein unvollständiger Schnitt oder eine übermässige Verbrennung des Stoffs oder der Stoffschicht. Daher eignet sich diese Lösung nur für Stoffe oder Stoffschichten mit einer Dicke, die in einem sehr engen Toleranzbereich liegt.From the JP-H08-243776 a single-head embroidery machine is known which comprises a laser processing machine in order to cut out an application from a fabric or a fabric layer. If the application is to be cut out of a fabric layer, this fabric layer lies on another fabric layer that should not be cut. The fabric or the fabric layers lie directly on a laser receiving plate. The laser receiving plate has a tap hole through the center of which the correctly focused laser runs. This arrangement is suitable for fabrics or fabric layers stretched in an embroidery frame, which lie directly on the laser receiving plate and are pressed onto the laser receiving plate by the holding-down part with the spring force of the spiral spring. If, however, the material or the layer of material to be cut shows too large a variation in its thickness, either an incomplete cut or excessive combustion of the material or the layer of material takes place. This solution is therefore suitable only for fabrics or layers of fabric with a thickness that is within a very narrow tolerance range.

Ein anderer Nachteil des Stichlochs gemäss der in der JP-H08-243776 gezeigten Ausführungsbeispiele besteht in der Emission von Laserlicht in den Produktionsraum, wenn das Laserlicht die Stoffbahn durchdringt. Somit erfordert die Verwendung der Lösung gemäss JP-H08-243776 aufwändige Schutzvorrichtungen zum Schutz der Mitarbeiter vor schädlichen Laserlichtemissionen, insbesondere bei Verwendung eines grobmaschigen Gewebes. Die Lösung gemäss JP-H08-243776 erfordert auch aufwändige Absaugungsvorrichtungen zur Absaugung von schädlichen Gasen, die durch den Schneidvorgang entstehen, wofür eine eigene Ansaugdüse, sowie eine durch den Rahmen verlaufende Leitung zum Ansauggebläse vorgesehen werden müssen.Another disadvantage of the tap hole according to the exemplary embodiments shown in JP-H08-243776 is the emission of laser light into the production space when the laser light penetrates the fabric web. Thus, the use of the solution according to JP-H08-243776 elaborate protective devices to protect employees from harmful laser light emissions, especially when using a coarse-mesh fabric. The solution according to JP-H08-243776 also requires complex suction devices for the extraction of harmful gases that arise from the cutting process, for which purpose a separate suction nozzle and a line running through the frame to the suction fan must be provided.

Eine Aufgabe der vorliegenden Erfindung ist die Schaffung eines Verfahrens und einer Vorrichtung, mit welcher sowohl schmelzbare Applikationen als auch nichtschmelzbare Applikationen geschnitten werden können, wobei die Dicke des flächigen Materialstücks veränderlich sein kann.An object of the present invention is to provide a method and a device with which both meltable applications and non-meltable applications can be cut, the thickness of the flat piece of material being variable.

Eine weitere Aufgabe der Erfindung besteht darin, dass das Schneiden nicht nur an einer einzigen Stelle, sondern an einer Vielzahl entlang der Stickmaschine angeordneten Stellen gleichzeitig ermöglicht wird.Another object of the invention is that the cutting is made possible not only at a single point, but also at a plurality of points arranged along the embroidery machine.

Eine weitere Aufgabe ist die Schaffung einer Vorrichtung, mit welcher die Applikation exakt an der optimalen Stelle zum Schneidelement nicht nur in X-Y-Richtung, sondern auch in Z-Richtung positioniert und während des Schneidens in der optimalen Position zum Wirkungsbereich des Schneidorgans geführt werden kann.Another task is to create a device with which the application can be positioned at the optimum position Cutting element not only positioned in the XY direction, but also in the Z direction and can be guided to the effective area of the cutting element in the optimal position during cutting.

Eine weitere Aufgabe der Erfindung besteht darin, die für das Schneiden notwendige, in den Schneidbereich zugeführte Energie und daraus resultierende Erwärmung von Maschinenteilen sowie beim Schneiden anfallende Verunreinigungen und Gase vor Ort wieder abzuführen.A further object of the invention is to dissipate the energy required for the cutting and fed into the cutting area and the resulting heating of machine parts as well as impurities and gases occurring during cutting on site.

Gelöst wird diese Aufgabe durch ein Verfahren gemäss den Merkmalen des Patentanspruchs 1 sowie durch eine Stickmaschine oder Nähmaschine gemäss Patentanspruch 7. Ein Verfahren, um mittels einer Stickmaschine oder Nähmaschine flächige Materialstücke von gewünschter Form auf einen Stickboden zu applizieren umfasst nachfolgende Schritte: mindestens eine Materialschicht wird über dem Stickboden angeordnet. Gesteuert durch ein Programm der Stickmaschine oder Nähmaschine wird eine Relativbewegung zwischen einer an der Stick- oder Nähmaschine angeordneten Schneidvorrichtung, enthaltend ein Schneidorgan und der Materialschicht erzeugt, um mit dem Schneidorgan ein Materialstück der Materialschicht auszuschneiden, wobei das Schneidorgan zusammen mit einem Gehäuse, in welches das Schneidorgan eingesetzt ist, in Richtung auf die Materialschicht und/oder die Materialschicht und der Stickboden an das Gehäuse vorgeschoben wird, bis die Vorderseite des Gehäuses die Materialschicht berührt. Die Materialschicht liegt an der Vorderseite des Gehäuses, die eine Referenzebene E bildet, geglättet an, wobei durch eine in der Vorderseite des Gehäuses ausgebildete Öffnung im Gehäuse das Schneidorgan in die Materialschicht eindringt und wobei die Materialschicht durch das Schneidorgan geschnitten wird. Während des Schneidvorgangs wird die Materialschicht durch einen im Innenraum des Gehäuses anliegenden Unterdruck an die Öffnung angesaugt.This object is achieved by a method according to the features of claim 1 and by an embroidery machine or sewing machine according to claim 7. A method for applying flat material pieces of the desired shape to an embroidery base by means of an embroidery machine or sewing machine comprises the following steps: at least one material layer arranged above the embroidery floor. Controlled by a program of the embroidery machine or sewing machine, a relative movement is generated between a cutting device arranged on the embroidery or sewing machine, containing a cutting element and the material layer, in order to cut out a piece of material from the material layer with the cutting element, the cutting element together with a housing into which the cutting member is inserted, in the direction of the material layer and / or the material layer and the Stick floor is pushed to the housing until the front of the housing touches the material layer. The material layer lies smoothly on the front of the housing, which forms a reference plane E, the cutting element penetrating into the material layer through an opening formed in the front of the housing, and the material layer being cut by the cutting element. During the cutting process, the material layer is sucked into the opening by a negative pressure present in the interior of the housing.

Nach einem Ausführungsbeispiel kann die Materialschicht an einem die Öffnung ganz oder teilweise umgebenden Wulst positioniert werden. Im Bereich der Öffnung kann am Gehäuse durch Absaugen von Luft im Innenraum des Gehäuses ein gegenüber der Umgebung niedrigerer Druck aufgebaut werden, durch den die an der Öffnung anliegende Materialschicht durch die in das Gehäuse einströmende Luft an die Öffnung des Gehäuses angesaugt wird.According to one embodiment, the material layer can be positioned on a bead that completely or partially surrounds the opening. In the area of the opening, air can be built up in the interior of the housing to extract a lower pressure than the surroundings, by means of which the material layer adjacent to the opening is sucked into the opening of the housing by the air flowing into the housing.

Nach einem Ausführungsbeispiel kann zum Schneiden der Materialschicht ein Laserstrahl als Schneidorgan durch das Gehäuse geleitet werden, dessen Brennpunkt im Bereich der Öffnung, welche eine Referenzebene E bildet, fokussiert wird, und die Materialschicht schneidet. Der Schneidvorgang kann zumindest eines der Schneidverfahren Schmelzen, Verbrennen, Verdampfen umfassen.According to one embodiment, a laser beam can be passed through the housing as a cutting element for cutting the material layer, the focal point of which is focused in the region of the opening which forms a reference plane E and cuts the material layer. The cutting process can include at least one of the cutting methods melting, burning, evaporating.

Die Schneidvorrichtung kann eine beheizbare Spitze umfassen, die im Gehäuse angeordnet ist, wobei die beheizbare Spitze eine Referenzebene E über der Öffnung um den Betrag der Dicke der Materialschicht durchdringt und die Materialschicht schneidet. Insbesondere kann die Materialschicht eine Kunstfaser enthalten. Erfindungsgemäß wird die Materialschicht beim Ansaugen an die Öffnung der Schneidvorrichtung vom Stickboden abgehoben, wodurch das Schneidorgan beim Schneiden der Materialschicht den Stickboden nicht berührt und nicht beschädigt.The cutting device can comprise a heatable tip which is arranged in the housing, the heatable tip penetrating a reference plane E above the opening by the amount of the thickness of the material layer and cutting the material layer. In particular, the material layer can contain a synthetic fiber. According to the invention, the material layer is lifted off the embroidery base when it is sucked into the opening of the cutting device, so that the cutting member does not touch and damage the embroidery base when the material layer is being cut.

Eine Stick- oder Nähmaschine enthält eine Schneidvorrichtung für einen Stickboden mit einer Materialschicht, wobei die Materialschicht auf dem Stickboden aufliegt, wobei die Stickmaschine oder Nähmaschine ein Steuerungsprogramm zur Steuerung der Schneidvorrichtung umfasst, sodass durch die Schneidvorrichtung flächige Materialstücke von der Materialschicht schneidbar sind. Die Schneidvorrichtung umfasst ein Schneidorgan. Die Schneidvorrichtung ist zwischen einer Ruhestellung und einer Arbeitsstellung an die Materialschicht über den Stickboden bewegbar und/oder die Materialschicht an die Schneidvorrichtung heranführbar ausgebildet. Das Schneidorgan ist in einem Gehäuse der Schneidvorrichtung angeordnet. Das Gehäuse weist eine Öffnung auf, wobei die Öffnung in der Arbeitsstellung mit der Materialschicht in Kontakt bringbar ist, derart, dass das Schneidorgan im Bereich der Öffnung in die Materialschicht eindringbar ist. Im Innenraum des Gehäuses ist ein Unterdruck erzeugbar, der dazu geeignet ist, die Materialschicht an die Öffnung anzusaugen. Die Schneidvorrichtung ist so ausgeführt, dass die Materialschicht beim Ansaugen an die Öffnung vom Stickboden abgehoben wird und das Schneidorgan ist so angeordnet, dass es beim Schneiden der Materialschicht den Stickboden nicht berührt und nicht beschädigt. Insbesondere kann Öffnung von einem Wulst ganz oder teilweise umschlossen sein.An embroidery or sewing machine contains a cutting device for an embroidery base with a material layer, the material layer lying on the embroidery base, the embroidery machine or sewing machine comprising a control program for controlling the cutting device, so that flat material pieces can be cut by the material layer through the cutting device. The cutting device comprises a cutting member. The cutting device can be moved between a rest position and a working position on the material layer via the embroidery base and / or the material layer can be brought up to the cutting device. The cutting member is arranged in a housing of the cutting device. The housing has an opening, the opening in the working position with the Material layer can be brought into contact such that the cutting member can penetrate into the material layer in the region of the opening. A negative pressure can be generated in the interior of the housing and is suitable for sucking the material layer onto the opening. The cutting device is designed in such a way that the material layer is lifted off the embroidery base when it is sucked into the opening, and the cutting element is arranged in such a way that it does not touch and damage the embroidery base when the material layer is cut. In particular, the opening can be completely or partially enclosed by a bead.

Nach einem Ausführungsbeispiel mündet eine Absaugleitung in das Gehäuse, wobei durch die Öffnung Luft ansaugbar ist, sodass die Materialschicht, die sich in Arbeitsstellung vor der Öffnung befindet, an der Öffnung anliegt.According to one exemplary embodiment, a suction line opens into the housing, air being able to be sucked in through the opening, so that the material layer which is in the working position in front of the opening lies against the opening.

Nach einem Ausführungsbeispiel kann als Schneidorgan im Gehäuse eine Heizspitze angeordnet sein, mittels welcher die Materialschicht an der Öffnung durchtrennbar ist. Nach einem alternativen Ausführungsbeispiel kann als Schneidorgan im Gehäuse ein Lasermodul zur Erzeugung eines Laserstrahls angeordnet sein, in dessen Brennpunkt die Materialschicht an der Öffnung schneidbar ist.According to one embodiment, a heating tip can be arranged as a cutting element in the housing, by means of which the material layer at the opening can be severed. According to an alternative exemplary embodiment, a laser module for generating a laser beam can be arranged in the housing as the cutting element, in the focal point of which the material layer at the opening can be cut.

Nach einem Ausführungsbeispiel mündet eine Blasluftleitung in das Gehäuse, um einen Luftstrom zu bilden, mit welchem Schmutzpartikel und/oder gasförmige Verunreinigungen aus dem Bereich des Schneidorgans wegführbar und mittels der Absaugleitung abführbar sind. Insbesondere kann die Absaugleitung in eine ringförmige Zone im Gehäuse münden, die innen von einem Mantel begrenzt ist, in welchem der Laserstrahl geführt oder die Heizspitze angeordnet ist. Gemäss dieses Ausführungsbeispiels können auf besonders vorteilhafte Weise Schmutzpartikel und/oder gasförmigen Verunreinigungen vom Schnittbereich abgesaugt werden, sodass sie nicht in den Maschinenraum gelangen können. Hierdurch werden die Emissionen bereits am Ort ihrer Entstehung entfernt, sodass auf weitergehenden Schutzmassnahmen für Mitarbeiter verzichtet werden kann, da die Emissionen bereits vor einem etwaigen Austritt in den Produktionsraum abgesaugt werden.According to one exemplary embodiment, a blown air line opens into the housing in order to form an air flow with which dirt particles and / or gaseous impurities can be removed from the area of the cutting member and removed by means of the suction line. In particular, the Suction line open into an annular zone in the housing, which is delimited on the inside by a jacket in which the laser beam is guided or the heating tip is arranged. According to this exemplary embodiment, dirt particles and / or gaseous impurities can be suctioned off from the cutting area in a particularly advantageous manner, so that they cannot get into the machine room. As a result, the emissions are removed at the point of origin, so that further protective measures for employees can be dispensed with, since the emissions are sucked off before they are released into the production area.

Insbesondere kann das strömungsseitig vordere Ende des Mantels in einem Abstand zur Öffnung des Gehäuses enden, derart, dass in den vom Mantel umgebenen zentralen Bereich eingeleitete Spülluft die sich mit der durch die angesaugte Materialschicht durchtretende und durch die Öffnung angesaugte Luft durch die ringförmige Zone vor der Öffnung mit der abgesaugten Luft umlenkt und mit den Schmutzpartikeln und/oder gasförmigen Verunreinigungen in die Absaugleitung gelangt. Der Mantel kann insbesondere eine Innenfläche aufweisen, die als ein Konus ausgebildet ist, wobei der Querschnitt des Konus sich in Richtung der Öffnung verjüngt, sodass ein konischer Kanal ausgebildet wird. Die Spülluft wird über eine im Mantel befindliche Öffnung unter Druck in den von der Innenfläche des Konus begrenzten Innenraum eingeleitet und dient dazu, Verunreinigungen, welche die Wirkungsweise des den Innenraum durchlaufenden Lasers beeinträchtigen können, aus diesem Innenraum zu entfernen. Der Volumenstrom der Spülluft kann insbesondere ca. 15 l/min betragen. Damit die Spülluft über die Mündungsöffnung des Mantels umgelenkt und abgesaugt werden kann, wird an der Aussenseite des Mantels ein betragsmässig höherer Unterdruck angelegt. Zwischen der Aussenseite des Mantels und dem Gehäuse kann eine Kammer oder ein Raum angeordnet sein. Damit die von der Mündungsöffnung in den Raum eintretende Spülluft aus diesem Raum abgesaugt werden kann, ohne dass sie durch die Öffnung hindurchtritt, muss in diesem Raum ein im Vergleich zum Druck der Spülluft betragsmässig höherer Unterdruck herrschen. Das heisst, der Volumenstrom der abgesaugten Luft beträgt mindestens das fünffache, vorzugsweise das sechsfache des in den Mantel eingeleiteten Volumenstroms an Spülluft. Beispielsweise kann aus dem Raum ein Volumenstrom von ungefähr 100 l/min Luft abgesaugt werden.In particular, the flow-side front end of the jacket can end at a distance from the opening of the housing, such that the scavenging air introduced into the central area surrounded by the jacket contains the air that passes through the material layer and is sucked in through the opening through the annular zone in front of the The opening is redirected with the extracted air and gets into the suction line with the dirt particles and / or gaseous impurities. The jacket can in particular have an inner surface which is designed as a cone, the cross section of the cone tapering in the direction of the opening, so that a conical channel is formed. The purge air is pressurized through an opening in the jacket introduced the interior delimited by the inner surface of the cone and serves to remove contaminants, which can impair the mode of operation of the laser passing through the interior, from this interior. The volume flow of the purge air can in particular be approximately 15 l / min. So that the scavenging air can be diverted and sucked off via the mouth opening of the jacket, a vacuum of higher magnitude is applied to the outside of the jacket. A chamber or a space can be arranged between the outside of the casing and the housing. So that the purging air entering the room from the mouth opening can be sucked out of this room without it passing through the opening, the vacuum in this room must be higher than the pressure of the purging air. This means that the volume flow of the extracted air is at least five times, preferably six times the volume flow of purge air introduced into the jacket. For example, a volume flow of approximately 100 l / min of air can be extracted from the room.

Insbesondere kann die Öffnung in einer sich zur Öffnung seitlich erstreckenden Führungs- oder Auflageplatte angeordnet sein, deren seitliche Kanten in einem spitzen Winkel zur Oberfläche der Führungs- oder Auflageplatte verlaufend ausgebildet sind.In particular, the opening can be arranged in a guide or support plate extending laterally to the opening, the lateral edges of which are formed at an acute angle to the surface of the guide or support plate.

Insbesondere kann als Laser ein Diodenlaser einsetzbar sein. Der Diodenlaser kann eine Wellenlänge im Bereich von 435 nm bis 455 nm aufweisen. Insbesondere kann die Wellenlänge 455 nm betragen. In dieser Wellenlänge sind derzeit die kleinsten und stärksten Laser erhältlich. Diese Diodenlaser ist besonders vorteilhaft, da es sich um einen leistungsstarken Laser insbesondere für eine Leistung von 8W handelt. Diese Leistung von 8W ist die Diodenausgangsleistung vor Umlenkung und gegebenenfalls verwendeter optischer Elemente zur Bündelung des Laserstrahls. Aus der Diode oder der Mehrzahl an Dioden wird das kollimierte, d.h. parallele Laserlicht mittels einer Sammellinse an einem definierten Referenzpunkt gebündelt.In particular, a diode laser can be used as the laser. The diode laser can have a wavelength in the range from 435 nm to 455 nm. In particular, the wavelength can be 455 nm. The smallest and strongest lasers are currently available in this wavelength. This diode laser is particularly advantageous because it is a powerful laser, especially for an output of 8W. This power of 8W is the diode output power before deflection and any optical elements used to bundle the laser beam. From the diode or the plurality of diodes, the collimated, i.e. parallel laser light bundled at a defined reference point using a converging lens.

Je nach dem eingesetzten Typ an optischen Elementen kann die Ausgangsleistung gegenüber der Nennleistung von 8W absinken.Depending on the type of optical elements used, the output power can drop compared to the nominal power of 8W.

Nach einem Ausführungsbeispiel können eine Mehrzahl von Diodenlasern optisch verschaltet werden, insbesondere können vier Diodenlaser optisch verschaltet werden.According to one embodiment, a plurality of diode lasers can be optically connected, in particular four diode lasers can be optically connected.

Es gelingt, die Vorteile einer Laserschneidvorrichtung, nämlich sowohl schmelzbare Applikationen als auch nichtschmelzbare Applikationen auszuschneiden, und auch die Vorteile der in der EP1983083 beschriebenen Verfahren und Vorrichtung zum gleichzeitigen Schneiden an einer Mehrzahl von Stickstellen zu ermöglichen.It is possible to cut out the advantages of a laser cutting device, namely both fusible applications and non-fusible applications, and also the advantages of the in EP1983083 described procedures and To enable device for simultaneous cutting at a plurality of embroidery sites.

Durch die Anordnung der Schneidvorrichtung innerhalb eines in Richtung auf den Stickgrund und die darauf applizierte Materialschicht hin offenen Raums mit dem Schneidorgan, in welchem gegenüber der Umgebung ein Unterdruck erzeugt werden kann, und der an die Applikation oder die Applikation an die Schneidvorrichtung herangeführt werden kann, lässt sich die meist nur ca. 1/10-dicke Applikationsschicht an die Öffnung des Raums, die als Referenzfläche fungiert, anlegen und, sobald ein Unterdruck in diesem Raum aufgebaut wird, auch an diese ansaugen und so einerseits zu glätten und andererseits relativ zur Schneidvorrichtung exakt zu positionieren. Gleichzeitig werden durch ein Vakuum im Raum bei Verwendung eines Lasers als Schneidorgan anfallende Dämpfe und/oder Schneidpartikel vor Ort abgesaugt. Zusätzlich wird die beim Schneiden erzeugte Wärme des Schneidelements direkt aus dem Bereich des Stoffes, d. h. des Stickbodens und der Applikation abgeführt. Eine Übertragung der Wärme an andere Maschinenelemente der Stickmaschine wird verringert. Auf diese Weise ist das Schneiden im Dauerbetrieb besser geeignet. Im Weiteren kann durch die exakte Positionierung der Materialschicht, d.h. die Applikation in Relation zum Brennpunkt eines Laserstrahls oder einer Heizspitze, zehntelmillimetergenau erreicht werden, wodurch einerseits mit einer sehr geringen Leistung gearbeitet werden kann und andererseits eine minimale Menge von schädlichen Gasen erzeugt wird. Ein weiterer sehr wesentlicher Vorteil besteht darin, dass durch Ansaugen der Applikation an die Öffnung des Raums die Applikation leicht von der Oberfläche des Stickgrundes abgehoben wird und dadurch die für das Schneiden notwendige Energie, die in die Applikation eingebracht werden muss, nicht auch unmittelbar auf dem Stickgrund anfällt und diesen allenfalls verfärben, aber nicht beschädigen kann. Dies insbesondere, wenn Applikationen mit einem Laser geschnitten werden, die nicht schmelzen, sondern die zum Schneiden versengt, verbrannt oder verdampft werden müssen. Durch das Abheben der Applikation vom Stickgrund kann auf das Einlegen einer später aufwändig wieder auszuwaschenden Trennschicht verzichtet werden.As a result of the arrangement of the cutting device within a space with the cutting element which is open in the direction of the embroidery base and the material layer applied thereon, in which a negative pressure can be generated in relation to the environment and which can be brought up to the application or the application to the cutting device. the usually only approx. 1/10 thick application layer can be applied to the opening of the room, which acts as a reference surface and, as soon as a negative pressure is built up in this room, also sucked onto it and thus smoothed on the one hand and on the other hand relative to the cutting device to be positioned exactly. At the same time, vapors and / or cutting particles are extracted on site by a vacuum in the room when using a laser as a cutting element. In addition, the heat of the cutting element generated during cutting is dissipated directly from the area of the fabric, ie the embroidery base and the application. Transfer of heat to other machine elements of the embroidery machine is reduced. In this way, cutting is more suitable in continuous operation. Furthermore, the exact positioning of the material layer, ie the application in relation to the focal point of a laser beam or a heating tip, enables tenths of a millimeter to be achieved, which means that on the one hand it is possible to work with very little power and on the other hand, a minimal amount of harmful gases is generated. Another very important advantage is that by sucking the application onto the opening of the room, the application is easily lifted off the surface of the embroidery base and therefore the energy required for cutting, which has to be introduced into the application, is not also directly on the Embroidery base is produced and may discolor it, but it cannot damage it. This is particularly the case when cutting applications with a laser that do not melt, but that have to be scorched, burned or evaporated for cutting. By lifting the application from the embroidery base, there is no need to insert a separating layer that is later difficult to wash out.

Dioden-Laser sind sehr klein und lassen sich daher in geringen seitlichen Abständen entlang der Stickmaschine positionieren und können so gleichzeitig eine Vielzahl von über die gesamte Länge der Stickmaschine verteilte Figuren ausschneiden.Diode lasers are very small and can therefore be positioned at short lateral distances along the embroidery machine and can thus cut out a large number of figures distributed over the entire length of the embroidery machine.

Mit einer erweiterten Auflagefläche in der Ebene des Brennpunkts des Laserstrahls kann bewirkt werden, dass das Ausschneiden von Applikationen mühelos auch bei bestickten Werkstücken möglich ist, wenn auf diesen Soutache-Stickerei oder andere die Oberfläche überragende Stickereien vorhanden sind. Das Einhaken oder zur Seite schieben von Stickereielementen wird durch die vergrösserte Auflageplatte verhindert.With an extended contact surface in the plane of the focal point of the laser beam, applications can be cut out effortlessly, even with embroidered workpieces, if there is embroidery on the soutache or other embroidery that surpasses the surface are. The enlarged support plate prevents embroidery elements from being hooked or pushed aside.

Einerseits werden Kosten durch Verminderung von Arbeitsschritten gegenüber dem bekannten Laserschneiden und anderseits eine Belastung des bestickten Stoffes und der Stickerei durch Auswaschmittel vermieden, da auf die Auswaschmittel verzichtet werden kann. Im Weiteren kann ein Verzug des Stickbodens und der Applikation, wie dieser beim Laser-Schneiden an einer einzigen Stelle auftritt, vermieden werden. Andererseits entfallen auch die Kosten für die Trennschicht und das vorherige Einbringen der Trennschicht zwischen dem Stickboden und der Applikation. Das erfindungsgemässe Verfahren und Vorrichtungen vereinen die Vorteile des Schneidens mit einem Laser mit den Vorteilen des Schneidens mit einer Heizspitze. Es können nun sowohl schmelzbare als auch nicht schmelzbare Applikationen geschnitten werden. Es können eine Vielzahl von Schneidvorrichtungen nebeneinander auf der Stickmaschine angeordnet und betrieben werden.On the one hand, costs are reduced by reducing work steps compared to the known laser cutting and, on the other hand, a load on the embroidered fabric and the embroidery by washing-out agents is avoided, since the washing-out agents can be dispensed with. Furthermore, warping of the embroidery base and the application, as occurs at a single point during laser cutting, can be avoided. On the other hand, the costs for the separating layer and the prior introduction of the separating layer between the embroidery base and the application are also eliminated. The method and devices according to the invention combine the advantages of cutting with a laser with the advantages of cutting with a heating tip. Both fusible and non-fusible applications can now be cut. A large number of cutting devices can be arranged and operated side by side on the embroidery machine.

Gegenüber den herkömmlichen Laserschneidvorrichtungen ist der Aufwand zur Vermeidung von Verletzungen der Augen des Betriebspersonals durch die Kapselung des Laserstrahls in einem Raum, dessen Öffnung direkt auf der Applikation anliegt, gewährleistet. Im Weiteren ist die Absaugung von Gasen und Verunreinigungen, die beim Schneiden von Kunststoffmaterialien oder natürlichen Materialien zwangsläufig anfallen, mit weitaus geringeren Durchsatzmengen möglich, da die Absaugung unmittelbar an der Entstehungsstelle der Verunreinigungen erfolgt. Die Verunreinigungen können also zum Vornherein nicht in die Umgebung der Maschine entweichen.Compared to conventional laser cutting devices, the effort to avoid injury to the eyes of the operating personnel is guaranteed by encapsulating the laser beam in a room, the opening of which lies directly on the application. In addition, the extraction of Gases and contaminants, which are inevitable when cutting plastic or natural materials, are possible with much lower throughputs, since the extraction takes place directly at the point where the contaminants originate. The contaminants cannot escape into the environment of the machine beforehand.

Die Dimension der einzelnen Schneidvorrichtungen ist derart kompakt, dass in Abständen von etwas mehr als 100 Millimetern Schneidvorrichtungen auf der Stickmaschine nebeneinander angeordnet werden können. Diese Abstände liegen also meistens im Bereich der kleinen bzw. engen Rapporte der Stickerei. Dies ermöglicht das gleichzeitige Ausschneiden vieler kleiner oder grosser Figuren, die eng nebeneinander gestickt worden sind.The dimensions of the individual cutting devices are so compact that cutting devices can be arranged side by side on the embroidery machine at intervals of slightly more than 100 millimeters. These distances are usually in the area of the small or narrow repetitions of the embroidery. This makes it possible to cut out many small or large figures that have been stitched close together.

Anhand zweier Ausführungsbeispiele wird die Erfindung näher erläutert.The invention is explained in more detail using two exemplary embodiments.

Es zeigen:

Figur 1
ein Layout einer Stickmaschine,
Figur 2
eine perspektivische Darstellung einer Schneidvorrichtung auf einer Stickmaschine,
Figur 3
ein Vertikalschnitt durch die Stickmaschine auf Höhe einer Schneidvorrichtung,
Figur 4
einen vergrössert dargestellten Vertikalschnitt durch die Schneidvorrichtung,
Figur 5
eine Aufsicht auf die Schneidvorrichtung,
Figur 6
einen Vertikalschnitt durch eine weitere Ausgestaltung der Schneidvorrichtung und
Figur 7
eine Aufsicht auf die Schneidvorrichtung gemäss Figur 6.
Show it:
Figure 1
a layout of an embroidery machine,
Figure 2
1 shows a perspective illustration of a cutting device on an embroidery machine,
Figure 3
a vertical section through the embroidery machine at the level of a cutting device,
Figure 4
a magnified vertical section through the cutting device,
Figure 5
a supervision of the cutting device,
Figure 6
a vertical section through a further embodiment of the cutting device and
Figure 7
a top view of the cutting device according to Figure 6 ,

Bezugszeichen 1 bezeichnet eine Stickmaschine, insbesondere eine Grossstickmaschine mit einer Vielzahl von bis zu 1100 an Nadelträgern 4 gehaltenen Nadeln 3, welche vor Stichlöchern 5 in einer Stichlochplatte 7 positioniert sind. Oberhalb der Nadeln 3 sind im Wesentlichen kubische Verschalungen 21 angeordnet, welche schematisch die Schneidvorrichtungen 9 darstellen. Zu den Schneidvorrichtungen 9 führen unter anderem eine Druckluftleitung 11 für Spülluft und den Antrieb, Energieleitungen 13 für ein Schneidorgan 15, im dargestellten Beispiel einem Diodenlaser 27, sowie eine Absaugleitung 17, welche ebenfalls mit der Schneidvorrichtung 9 verbunden ist. Die Schneidvorrichtung 9 ist mit der Stickmaschine 1 bzw. längs der Stickmaschine 1 verlaufenden Trägern (Träger nicht dargestellt) verbindbar ausgebildet.Reference numeral 1 designates an embroidery machine, in particular a large embroidery machine with a plurality of up to 1100 needles 3 held on needle carriers 4, which needles are positioned in front of stitch holes 5 in a needle plate 7. Essentially cubic formwork 21 is arranged above the needles 3, which schematically represent the cutting devices 9. A compressed air line 11 for purging air and the drive, energy lines 13 for a cutting element 15, in the example shown a diode laser 27, and a suction line 17, which is also connected to the cutting device 9, lead to the cutting devices 9. The cutting device 9 is designed to be connectable to the embroidery machine 1 or to carriers (carriers not shown) running along the embroidery machine 1.

Die Absaugleitungen 17 zu den Schneidvorrichtungen 9 sind mit einer längs der Stickmaschine 1 verlaufenden zentralen Absaugung 19 verbunden. Mit einem im Einzelnen nicht dargestellten Antrieb, z.B. Pneumatikantrieb, kann ein Gehäuse 39 in der Schneidvorrichtung 9, oder können mindestens Teile davon, in Richtung auf die Stichlochplatte 7 hin und von dieser weggeführt werden. Die Versorgung mit Druckluft durch die Druckluftleitung 11 sowie mit Saugluft für die zentrale Absaugleitung 19, die Energieleitungen sowie nicht weiter dargestellte Steuerleitungen erfolgen vorzugsweise zentral an der Stickmaschine 1.The suction lines 17 to the cutting devices 9 are connected to a central suction 19 running along the embroidery machine 1. With a drive not shown in detail, for example a pneumatic drive, a Housing 39 in the cutting device 9, or at least parts thereof, can be guided in the direction of the needle plate 7 and away from it. The supply of compressed air through the compressed air line 11 and with suction air for the central suction line 19, the energy lines and control lines (not shown further) are preferably carried out centrally on the embroidery machine 1.

Wie aus insbesondere den Figuren 1 und 2 ersichtlich, können die Schneidvorrichtungen 9 Seite an Seite über jeweils vier oder fünf Nadeln 3 oder Bohrern bzw. Bohrerhaltern 6 angeordnet werden. Mit anderen Worten: Es können folglich mit jeder Schneidvorrichtung 9 auch eine Vielzahl von kleinsten Arbeitsbereichen, die nahe beieinander liegen, bearbeitet bzw. ausgeschnitten werden, ohne dass dazu wie beim Stand der Lasertechnik eine Neujustierung der Schneidvorrichtung 1 notwendig wird.As from in particular Figures 1 and 2 As can be seen, the cutting devices 9 can be arranged side by side over four or five needles 3 or drills or drill holders 6. In other words, a multitude of smallest work areas, which are close to each other, can consequently be processed or cut out with each cutting device 9, without the need to readjust the cutting device 1, as in the prior art.

Nachfolgend wird anhand der Figuren 3 bis 5 der ersten Ausgestaltung der Aufbau einer Schneidvorrichtung 1 näher erläutert.The following is based on the Figures 3 to 5 the structure of a cutting device 1 explained in more detail in the first embodiment.

Jede Schneidvorrichtung 9 umfasst eine kastenförmige Verschalung 21, z.B. aus Metall, die mit der Stickmaschine 1 verbindbar ausgebildet ist (Verbindung mit Stickmaschine 1 nicht dargestellt). In der Verschalung 21 ist auf zwei Führungssäulen 23, welche eine Verbindung zur Stickmaschine darstellen, ein Gehäuse 39 und darin ein Lasermodul 25 mit beispielsweise vier Diodenlasern 27 motorisch oder pneumatisch in Z-Richtung längs verschiebbar geführt. Die Antriebsorgane für die Verschiebung sind nicht dargestellt. Vorzugsweise, jedoch nicht ausschliesslich, handelt es sich beim Laser um Diodenlaser 27 mit 435nm bis einschliesslich 455nm Wellenlänge, die optisch verschaltet sind. Auf der linken Seite der Diodenlaser 27 ist in Figur 3 eine geeignete optische Linse 29 als Fokussierungslinse eingesetzt. Die Linse 29 fokussiert die Laserstrahlen 51 des Diodenlasers 27 in einem Brennpunkt 49. An die optische Linse 29 schliesst ein beispielsweise konischer Kanal 31 an, in welchen die Druckluftleitung 11 mündet und Spülluft in den konischen Kanal 31 einführt, um eine Verunreinigung u.a. der Linse 29 zu verhindern. Mittels dieser Linse 29 lässt sich der Brennpunkt 49 in Z-Richtung genau einstellen. Der vordere Teil des Mantels 33 des konischen Kanals 31 liegt innerhalb eines Raums 35 des Gehäuses 39. In diesen Raum 35 münden eine oder mehrere Absaugleitungen 17. Das linksseitige Ende des Raums 35 wird durch eine Öffnung 41 im Gehäuse 39 als Mündung gebildet. Das vordere Ende des im Raum 35 angeordneten konischen Kanals 31 liegt vorzugsweise axial beabstandet zur Öffnung 41, d.h. zu einer Referenzebene E, welche über der Öffnung 41 liegt.Each cutting device 9 comprises a box-shaped casing 21, for example made of metal, which is designed to be connectable to the embroidery machine 1 (connection to the embroidery machine 1 not shown). In the casing 21, on two guide columns 23, which represent a connection to the embroidery machine, there is a housing 39 and therein a laser module 25 For example, four diode lasers 27 are guided so as to be longitudinally displaceable in the Z direction by motor or pneumatically. The drive elements for the shift are not shown. The laser is preferably, but not exclusively, diode lasers 27 with a wavelength of 435 nm to 455 nm, which are optically connected. On the left side of the diode laser 27 is in Figure 3 a suitable optical lens 29 is used as a focusing lens. The lens 29 focuses the laser beams 51 of the diode laser 27 at a focal point 49. A conical channel 31, for example, connects to the optical lens 29, into which the compressed air line 11 opens and introduces purge air into the conical channel 31 in order to contaminate the lens 29, among other things to prevent. The focal point 49 can be set precisely in the Z direction by means of this lens 29. The front part of the jacket 33 of the conical channel 31 lies within a space 35 of the housing 39. One or more suction lines 17 open into this space 35. The left-hand end of the space 35 is formed as an opening through an opening 41 in the housing 39. The front end of the conical channel 31 arranged in the space 35 is preferably axially spaced from the opening 41, ie to a reference plane E, which lies above the opening 41.

Durch die beschriebene beabstandete Lage des Kanals 31 entsteht eine ringförmige Zone 43 zwischen dem Ende des konischen Kanals 31 und der Öffnung 41.The described spaced position of the channel 31 creates an annular zone 43 between the end of the conical channel 31 and the opening 41.

Über diese ringförmige Zone 43 kann die durch die Druckluftleitung 11 in den konischen Kanal 31 eingeblasene Luft in den durch die Absaugleitung 17 abgesaugte Luft etwas unter Unterdruck stehenden Raum 35 abfliessen. An der Mündung bzw. Öffnung 41 des Gehäuses 39 wird folglich durch den Unterdruck im Raum 35 Luft eingesaugt.Via this ring-shaped zone 43, the air blown into the conical channel 31 through the compressed air line 11 can flow out into the space 35, which is under a somewhat negative pressure, through the suction line 17. At the mouth or opening 41 of the housing 39, air is thus sucked in by the negative pressure in the room 35.

In einer vorteilhaften Ausführung wird im Vergleich zur in den konischen Kanal 31 eingeblasener Luft ein Vielfaches, z.B. ein Sechsfaches an Luft aus dem Raum 35 abgesaugt, wie zugeführt. Die durch den Unterdruck im Raum 35 erzeugte Luftströmung in das Gehäuse 39 zieht an der Öffnung 41 beim Heranfahren des Gehäuses 39 an einen am Gatter der Stickmaschine 1 aufgespannten Stickboden 45 mit einer darauf durch eine Stickerei applizierte Materialschicht 47, letztere an die Öffnung 41 am Gehäuse 39 an. Dadurch hebt die Materialschicht 47 im Bereich der Öffnung 41 etwas vom Stickboden 45 ab. Dieses Abheben ergibt einen mit Luft gefüllten Zwischenraum 48 zwischen der Materialschicht 47 und dem darunterliegenden Stickboden 45. Dieser Zwischenraum 48 bewirkt, dass der Brennpunkt 49 eines Laserstrahls 51, der in der Materialschicht 47 zu liegen kommt, wohl die Materialschicht 47 zu trennen vermag, und den darunter liegenden Stickboden 45 nicht beschädigt.In an advantageous embodiment, compared to the air blown into the conical channel 31, a multiple, e.g. six times the air sucked out of the room 35 as supplied. The air flow generated by the negative pressure in the space 35 into the housing 39 pulls at the opening 41 when the housing 39 moves up to an embroidery base 45 spanned on the gate of the embroidery machine 1 with a material layer 47 applied thereon by an embroidery, the latter to the opening 41 on the housing 39 on. As a result, the material layer 47 lifts somewhat from the embroidery base 45 in the region of the opening 41. This lifting off results in an air-filled space 48 between the material layer 47 and the underlying embroidery base 45. This space 48 has the effect that the focal point 49 of a laser beam 51, which comes to lie in the material layer 47, is able to separate the material layer 47 and the underlying floor 45 is not damaged.

Die zu schneidende Materialschicht 47 wird durch die vom Gatter der Stickmaschine 1 ausgeführten x-y-Bewegungen des Stickbodens 45 und der darauf liegenden Materialschicht 47 an der Öffnung 41 vorbeigeführt. Dabei wird die Materialschicht 47 stets nur gerade im Bereich des Brennpunkts 49 des Laserstrahls 51 bei der Öffnung 41 vom Stickboden 45 abgehoben. Die Aussenkante 42 der Öffnung 41 oder ein die Öffnung 41 umgebender Wulst (nicht dargestellt) bildet die Referenzebene E (siehe Figur 5), in welcher der Brennpunkt 49 des Laserstrahls 51 liegt. Folglich liegt die Materialschicht 47 im Bereich des Brennpunkts 49, der mit der Linse 29 exakt auf die leicht an der Öffnung 41 plangespannt gehaltene Materialschicht 47 einstellbar ist.The material layer 47 to be cut is formed by the xy movements of the embroidery machine 1 Embroidery base 45 and the material layer 47 lying thereon past the opening 41. The material layer 47 is always lifted from the embroidery base 45 only in the area of the focal point 49 of the laser beam 51 at the opening 41. The outer edge 42 of the opening 41 or a bead (not shown) surrounding the opening 41 forms the reference plane E (see Figure 5 ), in which the focal point 49 of the laser beam 51 lies. Consequently, the material layer 47 lies in the region of the focal point 49, which can be adjusted exactly with the lens 29 to the material layer 47, which is held slightly flat at the opening 41.

Das Ansaugen von Luft aus der Atmosphäre durch den Stickboden 45 und durch die Materialschicht 47 hindurch bewirkt zusätzlich eine Kühlung des Stickboden 45 und es werden alle durch den Verbrennungs- oder Versengungsvorgang des Laserstrahls 51 verursachten Gase und Partikel dort abgesaugt. Eine Verunreinigung der Stickerei und der umgebenden Luft bzw. Teile der Stickmaschine 1 können dadurch optimal verhindert werden.The suction of air from the atmosphere through the embroidery base 45 and through the material layer 47 additionally cools the embroidery base 45 and all gases and particles caused by the burning or scorching process of the laser beam 51 are extracted there. Contamination of the embroidery and the surrounding air or parts of the embroidery machine 1 can thereby be optimally prevented.

Im Weiteren werden der Laserstrahl 51 bzw. dessen für das menschliche Auge schädlichen Strahlen von der Umgebung optimal abgeschirmt, da das Gehäuse 39 mit seiner Öffnung 41 sehr nahe an der Stichlochplatte 7 zu liegen kommt und dadurch so gut wie keine schädlichen Strahlen durch den Stickgrund 45 nach aussen austreten können.Furthermore, the laser beam 51 or its rays, which are harmful to the human eye, are optimally shielded from the environment, since the housing 39 with its opening 41 comes to lie very close to the needle plate 7 and therefore virtually no harmful rays through the embroidery base 45 can exit to the outside.

Es ist ersichtlich, dass das Schneiden der Materialschicht 47 sowohl ohne Ansaugen an die Öffnung 41, als auch mit Ansaugen geschnitten werden kann. Das Ansaugen erhöht die Sicherheit, dass die Materialschicht 47 plan an der Öffnung 41 und damit in der Referenzebene liegt, in der sich Brennpunkt 49 befindet.It can be seen that the cutting of the material layer 47 can be cut both without suction at the opening 41 and with suction. The suction increases the security that the material layer 47 lies flat on the opening 41 and thus in the reference plane in which focal point 49 is located.

Alternativ zu den den Laserstrahl 51 erzeugenden Dioden als Schneidorgan 15 kann im konischen Kanal 31 eine Heizspitze eingesetzt sein, deren Spitzenende die Öffnung 41 höchstens um die Dicke der zu schneidenden Materialschicht 47 überragt. Die Heizspitze trennt dadurch die Materialschicht 47 ohne den darunter liegenden, in einem Abstand zur Materialschicht 47 angeordneten Stickboden 45 zu berühren und damit zu beschädigen (Schneidspitze nicht dargestellt).As an alternative to the diodes generating the laser beam 51 as the cutting element 15, a heating tip can be used in the conical channel 31, the tip end of which projects beyond the opening 41 at most by the thickness of the material layer 47 to be cut. The heating tip thereby separates the material layer 47 without touching and thus damaging the underlying embroidery base 45, which is arranged at a distance from the material layer 47 (cutting tip not shown).

In der zweiten Ausgestaltung der Erfindung gemäss den Figuren 6 und 7 verläuft das vordere Ende des Gehäuses 39 nicht kegelstumpfförmig auf die Öffnung 41 hin, sondern die Öffnung 41 kommt in einer planen Führungs- oder Auflageplatte 53 zu liegen. Der durch die Führungs- oder Auflageplatte 53 wesentlich vergrösserte Auflagebereich der Schneidvorrichtung 9 auf der Materialschicht 47 bewirkt, wie bereits erwähnt, dass auch sehr unebene Flächen auf dem Stickboden 45 aufgebracht ist, geführt werden können.In the second embodiment of the invention according to the Figures 6 and 7 the front end of the housing 39 does not run in the shape of a truncated cone towards the opening 41, but the opening 41 comes to lie in a flat guide or support plate 53. The contact area of the cutting device 9 on the material layer 47, which is substantially enlarged by the guide or support plate 53, has the effect, as already mentioned, that very uneven surfaces are also applied to the embroidery base 45.

Bevorzugt sind die Randbereiche oder Kanten 55 der Führungs- oder Auflageplatte 53 in einem spitzen Winkel zur Oberfläche der Führungs- oder Auflageplatte 53 verlaufend angeordnet.The edge regions or edges 55 of the guide or support plate 53 are preferably arranged at an acute angle to the surface of the guide or support plate 53.

Eine miniaturisierte Ausführung der Schneidvorrichtung 9 liesse sich auch direkt an einem Bohrerträger 6 oder dem Nadelträger 4 (beide in Figur 3 schematisch dargestellt) anbringen und mit diesem an die Materialschicht 45 vor und von dieser zurück in eine Ruhestellung führen.A miniaturized design of the cutting device 9 could also be carried out directly on a drill carrier 6 or the needle carrier 4 (both in FIG Figure 3 attached schematically) and lead it to the material layer 45 in front of and from it back to a rest position.

Legende der BezugszeichenLegend of the reference symbols

11
StickmaschineEmbroidery machine
33
NadelnNeedles
44
NadelträgerNeedle carrier
55
StichlochTaphole
66
BohrerhalterDrill holder
77
StichlochplatteNeedle plate
99
SchneidvorrichtungCutting device
1111
DruckluftleitungCompressed air line
1313
EnergieleitungPower line
1515
SchneidorganCutting organ
1717
AbsaugleitungSuction line
1919
zentrale Absaugleitungcentral suction line
2121
VerschalungFormwork
2323
Führungssäuleguide column
2525
LasermodulLaser module
2727
DiodenlaserDiode laser
2929
optische Linseoptical lens
3131
konischer Kanalconical channel
3333
Mantel von 31Coat of 31
3535
Raumroom
3939
Gehäusecasing
4040
Wulstbead
4141
Öffnung von 37Opening from 37
4242
AussenkanteOuter edge
4343
ZoneZone
4545
StickbodenEmbroidery floor
4747
MaterialschichtMaterial layer
4848
ZwischenraumSpace
4949
BrennpunktFocus
5151
Laserstrahllaser beam
5353
Führungs- und AuflageplatteGuide and support plate
5555
Kanten an 53Edges on 53

Claims (15)

  1. A method in order to apply flat material pieces of desired shape to an embroidery base (45) by means of an embroidery or sewing machine (1), wherein at least one material layer (47) is arranged above the embroidery base (45), wherein, controlled by a program of the embroidery machine or sewing machine (1), a relative movement is produced between a cutting device (9) arranged on the embroidery or sewing machine (1), containing a cutting member (15), and the material layer (47), in order to cut out a material piece of the material layer (47) with the cutting member (15),
    - wherein the cutting member (15) is advanced together with a housing (39), into which the cutting member (15) is inserted, in the direction of the material layer (47) and/or the material layer (47) and the embroidery base (45) to the housing (39) until the front side of the housing (39) touches the material layer (47),
    - wherein the material layer (47) lies in contact, smoothed, with the front side of the housing (39), which forms a reference plane E,
    - wherein the cutting member (15) penetrates the material layer (47) though an opening (41) configured in the front side of the housing (39) in the housing (39), and
    - wherein the material layer (47) is cut by the cutting member (15), wherein during the cutting operation the material layer (47) is sucked in by a negative pressure present in the internal space of the housing (39) at the opening (41), characterized in that the material layer (47), during sucking in at the opening (41), is raised from the embroidery base (45) and the cutting member (15) does not touch and does not damage the embroidery base (45) during cutting of the material layer (47).
  2. The method according to Claim 1, characterized in that the material layer (47) is positioned on a bead (40) wholly or partially surrounding the opening (41).
  3. The method according to any one of Claims 1 or 2, characterized in that a lower pressure compared with the surroundings is built up in the region of the opening (41) on the housing (39) by suctioning off of air in the internal space of the housing (39), by means of which lower pressure the material layer (47) lying in contact with the opening (41) is sucked in by the air streaming into the housing (39) at the opening (41) of the housing (39).
  4. The method according to any one of Claims 1 to 3, characterized in that a laser beam (51) is routed through the housing (39) as a cutting member (15) in order to cut the material layer (47), the focal point of which laser beam is focused in the region of the opening (41) which forms a reference plane E, and cuts the material layer (47), wherein the cutting operation can comprise at least one of the cutting methods of melting, burning and vaporization.
  5. The method according to any one of Claims 1 to 3, characterized in that the cutting device (9) comprises a heatable point which is arranged in the housing (39), wherein the heatable point penetrates a reference plane E above the opening (41) by the amount of the thickness of the material layer (47) and cuts the material layer (47).
  6. The method according to Claim 5, characterized in that the material layer (47) contains a plastic fiber and/or the material layer (47) is meltable or not meltable.
  7. An embroidery or sewing machine (1), containing a cutting device (9) for an embroidery base (45) having a material layer (47), wherein the material layer (47) rests on the embroidery base (45), wherein the embroidery machine or sewing machine (1) comprises a control program for controlling the cutting device (9), such that flat material pieces of the material layer (47) is cuttable by the cutting device (9), wherein the cutting device (9) comprises a cutting member (15),
    wherein the cutting device (9) is movable between a resting position and a working position on the material layer (47) above the embroidery base (45), and/or the material layer (47) is configured such that it is able to be brought closer to the cutting device (9),
    wherein the cutting member (15) is arranged in a housing (39) of the cutting device (9) and the housing (39) has an opening (41), wherein the opening (41) is able to be brought into contact with the material layer (47) in the working position in such a way that the cutting member (15) is able to penetrate the material layer (47) in the region of the opening (41),
    wherein a negative pressure is producable in the internal space of the housing (39), which is suitable for sucking in the material layer (47) at the opening (41), characterized in that the cutting device (9) is designed such that the material layer (47) is raised from the embroidery base (45) during suctioning in at the opening (41) and the cutting member (15) is arranged such that it does not touch and does not damage the embroidery base (45) during cutting of the material layer (47) .
  8. The embroidery or sewing machine (1) according to Claim 7, characterized in that the opening (41) is wholly or partially enclosed by a bead (40).
  9. The embroidery or sewing machine (1) according to any one of Claims 7 or 8, characterized in that a suctioning-off line (17) opens out into the housing (39), wherein air is able to be sucked in through the opening (41) such that the material layer (47) which is located in the working position in front of the opening (41) lies in contact with the opening (41).
  10. The embroidery or sewing machine (1) according to any one of Claims 7 to 9, characterized in that a heating point is arranged as the cutting member (15) in the housing (39), by means of which the material layer (47) is severable at the opening (41), or a laser module (25) for producing a laser beam (51) is arranged as the cutting member (15) in the housing (39), in the focal point (49) of which laser beam the material layer (47) is cuttable at the opening (41).
  11. The embroidery or sewing machine (1) according to any one of Claims 9 or 10, characterized in that a blowing airline (11) opens out into the housing (39) in order to form an air flow, with which particles of dirt and/or gaseous impurities able to be led away from the region of the cutting member (15) and are dischargable by means of the suctioning-off line (17).
  12. The embroidery or sewing machine (1) according to Claim 11, characterized in that the suctioning-off line (17) opens out into an annular zone (43) in the housing (39), which is delimited internally by a casing (33) in which the laser beam (51) is guided or the heating point is arranged.
  13. The embroidery or sewing machine (1) according to Claim 12, characterized in that the front end of the casing (33) on the flow side ends at a distance from the opening (41) of the housing (39) in such a way that flushing air introduced into the central region surrounded by the casing (33) deflects the air entering through the sucked-in material layer (47) and sucked in through the opening (41) through the annular zone (43) in front of the opening (41) with the suctioned-off air and arrives with the particles of dirt and/or gaseous impurities in the suctioning-off line (17).
  14. The embroidery or sewing machine (1) according to Claim 7, characterized in that the opening (41) is arranged in a guide or support plate (53) extending laterally to the opening (41), the lateral edges of which are configured running at an acute angle to the surface of the guide or support plate 53.
  15. The embroidery or sewing machine (1) according to Claim 10 or any one of Claims 11-13 inasmuch as they relate to Claim 10, characterized in that a diode laser (27) is utilizable as a laser, wherein the diode laser (27) has in particular a wavelength in the range of 435 nm up to and including 455 nm.
EP15804501.3A 2015-01-14 2015-12-03 Method in order to apply flat material pieces of desired shape to an embroidery base by means of an embroidery machine or sewing machine and a device for an embroidery or sewing machine in order on the embroidery base to cut out flat material pieces such as figures made from another material applied to the embroidery base Active EP3245323B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00046/15A CH710610A1 (en) 2015-01-14 2015-01-14 Method in order to apply by means of an embroidery machine or the sewing machine surface material pieces of desired shape on a embroidery base and corresponding device for an embroidery sewing machine, or
CH01047/15A CH710614A2 (en) 2015-01-14 2015-07-17 Procedures to apply by means of an embroidery machine or sewing flat material pieces of desired shape on a stick floor and a device for embroidery or sewing machine to cut on the embroidery base sheet material pieces like figures from another applied on the stick base material.
PCT/EP2015/078509 WO2016113038A1 (en) 2015-01-14 2015-12-03 Method in order to apply flat material pieces of desired shape to an embroidery base by means of an embroidery machine or sewing machine and a device for an embroidery or sewing machine in order on the embroidery base to cut out flat material pieces such as figures made from another material applied to the embroidery base

Publications (2)

Publication Number Publication Date
EP3245323A1 EP3245323A1 (en) 2017-11-22
EP3245323B1 true EP3245323B1 (en) 2020-03-04

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Application Number Title Priority Date Filing Date
EP15804501.3A Active EP3245323B1 (en) 2015-01-14 2015-12-03 Method in order to apply flat material pieces of desired shape to an embroidery base by means of an embroidery machine or sewing machine and a device for an embroidery or sewing machine in order on the embroidery base to cut out flat material pieces such as figures made from another material applied to the embroidery base

Country Status (6)

Country Link
EP (1) EP3245323B1 (en)
KR (1) KR20170104569A (en)
CN (1) CN107223170A (en)
CH (2) CH710610A1 (en)
TW (1) TW201636473A (en)
WO (1) WO2016113038A1 (en)

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Publication number Priority date Publication date Assignee Title
CH714377B1 (en) * 2017-11-30 2021-10-15 Laesser Ag Method and device for applying flat applications to an embroidery base by means of an embroidery machine.
CN107900536A (en) * 2017-12-26 2018-04-13 宁夏小牛自动化设备有限公司 The dust-control method of dust-proof laser and string welding machine and laser
CN110172790B (en) * 2019-05-17 2022-06-14 湖州冠炯机电科技有限公司 Method for slicing multiple gold sheets
CN111020906A (en) * 2019-11-25 2020-04-17 绍兴柯桥区归零纺织品有限公司 Breathable laser embroidery fabric and manufacturing method thereof

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CH700701B1 (en) 2007-04-20 2010-10-15 Laesser Ag Method and apparatus for applying flat pieces of material, as well as embroidery machine having a plurality of such devices.
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Also Published As

Publication number Publication date
KR20170104569A (en) 2017-09-15
WO2016113038A1 (en) 2016-07-21
CH710614A2 (en) 2016-07-15
TW201636473A (en) 2016-10-16
CN107223170A (en) 2017-09-29
CH710610A1 (en) 2016-07-15
EP3245323A1 (en) 2017-11-22

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